This Standard applies to new construction and coverspressure.temperature ratings, dimensions, tolerances,materials, nondestructive examination requirements,testing, and marking for cast, forged, and fabricatedflanged, threaded, and welding end and wafer orflangeless valves of steel, nickel-base alloys, and otheralloys shown in Table 1. Wafer or flangeless valves,bolted or through-bolt types, that are installed betweenflanges or against a flange are treated as flanged-endvalves. Alternative rules for NPS 2 1/2 and smaller valvesare given in Mandatory Appendix V.